OXYQUINOLINE SULFATE is graded C (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
OXYQUINOLINE SULFATE
Safety grade: C
Oxyquinoline sulfate is a chemical compound that acts as a preservative and stabilizer in cosmetic products. It helps prevent the growth of bacteria and fungi while keeping product ingredients from separating.
This ingredient protects cosmetic products from microbial contamination and extends shelf life, while also helping to maintain a stable, uniform texture by preventing oil and water from separating.
Graded using: COSING.
- EU COSING — Restricted
- Health Canada — Restricted
Last verified: May 26, 2026
Safer alternatives to OXYQUINOLINE SULFATE
- ALCOHOL — Grade A**. Alcohol provides antimicrobial protection and preserves product stability.
- CETRIMONIUM CHLORIDE — Grade A. Cetrimonium chloride offers antimicrobial and preservative functions for shelf life.
- CARBOMER — Grade A. Carbomer stabilizes emulsions and prevents oil-water separation in formulations.
Other Antimicrobial ingredients
- C12-15 ALKYL BENZOATE — Grade A
- BENZYL BENZOATE — Grade C
- CHLORPHENESIN — Grade B
- CAMELLIA SINENSIS LEAF EXTRACT — Grade A
- HYDROGEN PEROXIDE — Grade C**
- CETYLPYRIDINIUM CHLORIDE — Grade A